At the time of the Moorish invasion, the Toledans were forced to surrender, after a two years' siege. They endeavoured to capitulate on the most favourable terms, and among the other conditions agreed upon, was the following: Six churches were to be reserved for the use of those Christians who might desire to live with the barbarians. These churches were those of St. Mark, Saint Luke, Saint Sebastian, Saint Torcato, Saint Eulalia, and Saint Justa. By this means the true faith was preserved in the city during the four hundred years' dominion of the Moors, and for this reason the faithful Toledans were termed Mozarabians, that is, "mixed with the Arabs." In the reign of Alonzo VI., when Toledo once more fell into the hands of the Christians, Richard, the Pope's legate, wished the Mozarabian ritual to be abandoned for the Gregorian; he was backed in this by the king and the queen Doña Constanza, who preferred the rites of Rome. All the clergy revolted, and exclaimed loudly against the change; the faithful were highly incensed, and their irritation was nearly causing an open insurrection and revolt of the people. The king, frightened by the turn that matters were taking, and fearful that the Toledans would proceed to acts of violence, tried to calm them in the best manner he could, and proposed the following singular _mezzo termine_, which was completely suited to the spirit of the times, and accepted with enthusiasm by both parties:--The partisans of the Gregorian and of the Mozarabic ritual were each to choose a champion, and the two were then to meet in mortal combat, in order to decide which idiom and which service was most pleasing to Heaven; and certainly, if the opinion of Heaven is to be taken, it cannot be taken more fitly than in the choice of a liturgy. The champion of the Mozarabians was named Don Ruiz de la Matanza; a day was appointed, and the Vega chosen as the field of battle. For some time the victory was uncertain, but in the end Don Ruiz gained the advantage, and left the lists as victor, amidst the cries of joy of the Toledans, who wept with pleasure, and, throwing their hats in the air, immediately repaired to their churches, in order to render up thanks to Heaven. The king and queen were greatly annoyed at this triumph. Reflecting, somewhat late in the day, that it was an impious, daring, and cruel act to decide a question of theology by a sanguinary combat, they said that the only means of determining the matter was by a miracle, and they therefore proposed another ordeal, to which the Toledans, confident of the excellence of their ritual, consented. After a general fast, and prayers in all the churches, a copy of the Gregorian ritual, as well as one of the Mozarabian, was to be placed upon a lighted pile, and that one which remained in the fire without being burnt, was to be considered as the more acceptable to Heaven.